Spencer Forrest is the manufacturer of Toppik Hair Building Fibers, the world’s leading cosmetic hair thickening product. The company produces a full range of Toppik branded products for men and women with thin or thinning hair. Spencer Forrest also manufacturers the XFusion brand of professional hair products sold in fine salons. The company was created in 1981 and is based in Los Angeles. Toppik products are distributed worldwide.